12.07.2015 Views

Stimulating investment in pearl farming in ... - World Fish Center

Stimulating investment in pearl farming in ... - World Fish Center

Stimulating investment in pearl farming in ... - World Fish Center

SHOW MORE
SHOW LESS
  • No tags were found...

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

to work alongside <strong>World</strong><strong>Fish</strong> science staff and ga<strong>in</strong> experience and confidence withcontribut<strong>in</strong>g to written reports.3.3 Water TemperatureSolomon Islands’ proximity to the equator and consistently high seawater temperatures(Appendix III) may <strong>in</strong> part be the cause of the rapid growth of black-lip <strong>pearl</strong> oyster.Figure 4 shows that Solomon Islands is the most northerly site <strong>in</strong> the region to growblack-lip <strong>pearl</strong>s, and that temperatures tend to be slightly higher than other black <strong>pearl</strong>areas (Fiji, Cook Islands and French Polynesia). The white-lip <strong>pearl</strong> oyster, which tendsto prefer warmer water than the black-lip, may also be an appropriate species choice forthis location.Temperature ranges for Solomon Islands and established <strong>pearl</strong><strong>in</strong>g countries are shown <strong>in</strong>Table 1. The warm, stable temperatures of Solomon Islands are similar to white-lipfarm<strong>in</strong>g regions at Northern Queensland/Torres Straight and PNG, and only slightlywarmer than black-lip farms at Cook Islands. Environmentally, Solomon Islands shouldbe suited to the culture of both black and white-lip <strong>pearl</strong> oysters.Table 1. Approximate temperatures of Solomon Island waters and for <strong>pearl</strong>-produc<strong>in</strong>gregions. Where a range of values is given data are available across a latitud<strong>in</strong>al range.Location M<strong>in</strong>imum Maximum RangeSolomon Is 27-28 29-30 2Northern Cook Is 27 29 2Fiji 24-27 28-29 2-4PNG 26-28 30 2-4French Polynesia 24-27 27-29 2-3NW Australia 24-25 28-30 4-5Torres Straight 26 29 3Vanuatu 24-27 28-30 3-43.4 White-lipped <strong>pearl</strong> oyster availabilityUnlike black-lip <strong>pearl</strong> oyster, white-lip is not commercially taken as spat. Instead amixture of harvested young adult shell and hatchery stock are used. Anecdotal reports ofhealthy populations of gold-lip <strong>pearl</strong> oysters at sites around Solomon Islands needed to beassessed and as part of this project a comprehensive survey was planned to assess stocks.3.5 The national white-lip surveyThe national white-lip survey was undertaken jo<strong>in</strong>tly by <strong>World</strong><strong>Fish</strong> <strong>Center</strong> and MFMR(see Appendix IV) and had four elements:8

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!